From feasibility to alternatives analysis to complete design, DHA’s transportation team is ready to hit the ground running.

DHA’s roadway experience includes a wide range of transportation infrastructure work. From large corridor projects with numerous interchanges to local agency road widening projects in challenging terrain, we have the know-how to deliver any transportation element a project may require. Our transportation and roadway engineers specialize in the following:

Feasibility and Advanced Planning Studies

Road Widening and Rehabilitation

Interchanges, Arterial, Collector, and Local Streets

Project Study Reports and Project Reports

Utility Coordination

Featured Projects

North County Corridor | Stanislaus County
DHA is leading the Project Approval & Environmental Documentation phase for the new SR 108 freeway/expressway through the cities of Modesto, Riverbank, and Oakdale. This $400 million project will create a new east-west freeway/expressway through Northern Stanislaus County.

Capital SouthEast Connector | Capital SouthEast Connector JPA
As the Project Manager and Program Manager for the Connector JPA, DHA completed the Plan of Finance for one of the Sacramento region’s largest transportation projects. The Southeast Connector will be a 34-mile long expressway/thoroughfare spanning from I-5 (Elk Grove) to Highway 50 (El Dorado Hills).

State Route 4/Wagon Trail Realignment | Calaveras County
DHA is serving as the project manager for the Wagon Trail Realignment project. This project entails reconstructing and realigning approximately 4 miles of SR 4 (Wagon Trail) in Calaveras County. Improvements include roadway realignment, lane and shoulder widening and other safety improvements. DHA is also assisting the County with the grant and funding management of the project.

Ekwill Street and Fowler Road | City of Goleta
DHA is currently designing the Ekwill Street and Fowler Road improvements which will enhance east-west traffic circulation near Old Town Goleta. This project includes the Fowler Road Extension which will connect the southern end of Kellogg Drive to Fairview Avenue, the Ekwill Street Extension which will relocate Ekwill Street, upgrades to Kellogg Avenue, and reconfiguration of the Hollister Avenue/SR 217 Interchange to include roundabouts.

Loyola Drive Bridge at Foothill Expressway | Santa Clara County
DHA designed a bridge widening project to relieve traffic congestion on Foothill Expressway. Currently under construction, the widening of the bridge will allow for the development of a continuous left turn pocket for both directions of traffic on Loyola Drive across the bridge.

List of Projects | Transportation

11th Street East Tracy Overhead | City of Tracy

11th Street/MacArthur Drive Intersection | City of Tracy

Antone Raymus Expressway | City of Manteca

Brooktrails Second Access | Mendocino County

Capital Southeast Connector | Capital Southeast Connector JPA

Clay Street Realignment and Bridge Replacement | City of Placerville

Cook Riolo Pathway | Placer County

Dowd Road Bridge over Yankee Slough | Placer County

Ekwill Street and Fowler Road Extension | City of Goleta

Golden State-Golf-Berkeley Intersection | Stanislaus County

Goleta/US 101 Overcrossing | City of Goleta

Hollister Class I Bicycle/Pedestrian Path Improvements | City of Goleta